A Study Of Continuous Oral Dosing Of A Novel Antiandrogen Mdv3100, In Castration-resistant Bone Metastatic Prostate Cancer Patients Evaluating The Tumor Micro-enviroment
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 发起方
- Pfizer
- 入组人数
- 60
- 试验地点
- 1
- 主要终点
- Change From Baseline in Bone Marrow Testosterone
研究概览
简要总结
This study is being conducted to determine the effect of enzalutamide on the androgen signaling pathway in correlation with the anti-tumor effects of enzalutamide to identify potential predictors of response or resistance to therapy.
研究设计
- 研究类型
- Interventional
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Confirmed prostate cancer
- •Presence of metastatic disease to the bone
- •Ongoing androgen deprivation therapy
排除标准
- •Severe concurrent disease
- •Metastases in the brain
研究组 & 干预措施
Enzalutamide
Participants received enzalutamide 160 mg, administered as four 40-mg capsules, once per day by mouth. Study drug treatment continued until disease progression, unacceptable toxicity, or withdrawal.
干预措施: Enzalutamide (Drug)
结局指标
主要结局
Change From Baseline in Bone Marrow Testosterone
时间窗: Baseline, Week 9
Bone marrow biopsies were performed at the Day 1 visit prior to initiation of enzalutamide administration. Repeat bone marrow biopsies were performed at the Week 9 visit. If a repeat bone marrow was not performed at the Week 9 visit or if a patient discontinued the study before the Week 9 visit, a bone marrow biopsy was obtained at the Safety Follow-up visit. Assessment of intratumoral testosterone was assessed by liquid chromatography mass spectrometry.
Change From Baseline in Bone Marrow Dihydrotestosterone
时间窗: Baseline, Week 9
Bone marrow biopsies were performed at the Day 1 visit prior to initiation of enzalutamide administration. Repeat bone marrow biopsies were performed at the Week 9 visit. If a repeat bone marrow was not performed at the Week 9 visit or if a patient discontinued the study before the Week 9 visit, a bone marrow biopsy was obtained at the Safety Follow-up visit. Assessment of intratumoral dihydrotestosterone was assessed by liquid chromatography mass spectrometry.
Change From Baseline in Bone Marrow Testosterone at Week 9 by Prostate-Specific Antigen (PSA) Response Status
时间窗: Baseline, Week 9
Bone marrow biopsies were performed at the Day 1 visit prior to initiation of enzalutamide administration. Repeat bone marrow biopsies were performed at the Week 9 visit. If a repeat bone marrow was not performed at the Week 9 visit or if a patient discontinued the study before the Week 9 visit, a bone marrow biopsy was obtained at the Safety Follow-up visit. Assessment of intratumoral testosterone was assessed by liquid chromatography mass spectrometry. Serum samples for measurement of PSA levels were obtained at baseline prior to initiation of enzalutamide administration and at the Week 9 visit. The change from baseline in bone marrow testosterone levels at Week 9 was correlated with PSA response status at Week 9.
Change From Baseline in Bone Marrow Dihydrotestosterone at Week 9 by Prostate-Specific Antigen (PSA) Response Status
时间窗: Baseline, Week 9
Bone marrow biopsies were performed at the Day 1 visit prior to initiation of enzalutamide administration. Repeat bone marrow biopsies were performed at the Week 9 visit. If a repeat bone marrow was not performed at the Week 9 visit or if a patient discontinued the study before the Week 9 visit, a bone marrow biopsy was obtained at the Safety Follow-up visit. Assessment of intratumoral dihydrotestosterone was assessed by liquid chromatography mass spectrometry. Serum samples for measurement of PSA levels were obtained at baseline prior to initiation of enzalutamide administration and at the Week 9 visit. The change from baseline in bone marrow dihydrotestosterone levels at Week 9 was correlated with PSA response status at Week 9.
次要结局
- Percentage of Participants at Week 9 With a Response in Prostate-Specific Antigen (PSA)(Baseline, Week 9)
- Median Time to Study Drug Discontinuation(Duration of study treatment through the data cutoff, up to 3 years.)
- Change From Baseline in Urinary N-Telopeptide(Baseline, Week 65)